Biological Aspects of Orius similis Zheng Reared on Two Preys at Three Constant Temperatures

Abstract

Mass-rearing of Orius similis Zheng on two preys, Aphis craccivora Koch and eggs of Corcyra cephalonica Stainton at three constant temperatures (22, 26 and 30 °C) and 60% ± 10% RH and 16:8 L/D photoperiod under laboratory conditions was investigated to study the effect of different temperatures and different preys on the biology of O. similis. The highest survival rate (%) of nymphal stages was 81.14% and the longest oviposition period for females (20.6 d) was recorded at 26 °C. Also, the highest fecundity of female also recorded at 26 °C. The highest rate of nymphal feeding consumption was (122.5 individuals of A. cracivora) also, recorded at 26 °C. As well as, the two preys had significant effects on the biological characteristics of O. similis. The highest survival rate for nymphal stage was recorded when O. similis nymphs fed on A. cracivora. Therefore, the longest survival rate was founded in the nymphs which fed on the individuals of A. cracivora. During the nymphal period of O. similis which consumed more individuals of A. cracivora than the eggs of C. cephalonica. These results on the effect of three constant temperatures and two preys on the biology of O. similis will share to improve the rearing of O. similis in biological control agents in China and share to suppress the population of pests in field and greenhouse.